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anastassius [24]
3 years ago
15

Administrators surveyed students enrolled in a new school in order to choose the school mascot. there are 480 students enrolled

in the school. what is the proportion needed to calculate the average number of students that chose the lion for the mascot?
Mathematics
2 answers:
Elis [28]3 years ago
7 0

Answer:

B: 27

Step-by-step explanation: got it right on edg 2020

JulijaS [17]3 years ago
3 0
The answer is 20/72 = x/480. This is because you have to add the numbers for the first sample to find the sample size and then make a ratio to determine the answer if the sample size increases to 480.
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The 173 workers at a factory together produce 21, 452 items per day. What is the daily rate of items per worker?
mafiozo [28]

Answer:

124 items per worker per day

Step-by-step explanation:

21,452/173=124

6 0
2 years ago
The odds in favor of a spinner landing on blue is 2:7. What is the probability of a spinner NOT landing on blue?
Doss [256]

Answer:

7/9

Step-by-step explanation:

P(blue) = 2:7

This means there are 2 blue parts for every 7 nonblue parts. So 9 parts total! 2:7, then, should be thought of as 2/9.

P(not blue) = 1 - 2/9

                  = 7/9

Think about it: there must be a total probability of 1, so the probability of <em>not</em> getting blue must be 7/9.

3 0
3 years ago
Suppose a consumer group suspects that the proportion of households that have three cell phones NOT known to be 30%. A cell phon
leva [86]

Answer:

We conclude that the actual percentage of households is equal to 30%.

Step-by-step explanation:

We are given that a consumer group suspects that the proportion of households that have three cell phones NOT known to be 30%.

Their marketing people survey 150 households with the result that 43 of the households have three cell phones.

Let p = <u><em>proportion of households that have three cell phones NOT known.</em></u>

So, Null Hypothesis, H_0 : p = 30%      {means that the actual percentage of households is equal to 30%}

Alternate Hypothesis, H_A : p \neq 30%     {means that the actual percentage of households different from 30%}

The test statistics that would be used here <u>One-sample z-test for proportions;</u>

                                T.S. =  \frac{\hat p-p}{\sqrt{\frac{p(1-p)}{n} } }  ~ N(0,1)

where, \hat p = sample proportion of households having three cell phones = \frac{43}{150} = 0.29

           n = sample of households = 150

So, <u><em>the test statistics</em></u>  =  \frac{0.29-0.30}{\sqrt{\frac{0.30(1-0.30)}{150} } }  

                                     =  -0.27

The value of z test statistic is -0.27.

<u>Also, P-value of the test statistics is given by;</u>

              P-value = P(Z < -0.27) = 1 - P(Z \leq 0.27)

                            = 1 - 0.6064 = <u>0.3936</u>

<u>Now, at 1% significance level the z table gives critical value of -2.58 and 2.58 for two-tailed test.</u>

Since our test statistic lies within the range of critical values of z, so we have insufficient evidence to reject our null hypothesis as it will not fall in the rejection region due to which <em><u>we fail to reject our null hypothesis</u></em>.

Therefore, we conclude that the actual percentage of households is equal to 30%.

4 0
3 years ago
The improper fraction is equivalent to which of the following decimal numbers?
Alla [95]

Answer:

3.6 is your Answer.

Step-by-step explanation:

5 0
3 years ago
In which quadrant does the point P(–1, 5) lie?
vesna_86 [32]
Quadrant number II
The quadrant II has the negative x axis and the positive y axis
8 0
3 years ago
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